func ReadResponse()

in pkg/profiling/task/network/analyze/layer7/protocols/http1/reader/response.go [56:109]
50 lines of code
12 McCabe index (conditional complexity)

func ReadResponse(req *Request, buf *buffer.Buffer, readBody bool) (*Response, enums.ParseResult, error) {
	bufReader := bufio.NewReader(buf)
	tp := textproto.NewReader(bufReader)
	resp := &http.Response{}
	result := &Response{original: resp, req: req}
	result.MessageOpt = &MessageOpt{result}

	headerStartPosition := buf.Position()
	line, err := tp.ReadLine()
	if err != nil {
		return nil, enums.ParseResultSkipPackage, fmt.Errorf("read response first line failure: %v", err)
	}
	indexByte := strings.IndexByte(line, ' ')
	if indexByte == -1 {
		return nil, enums.ParseResultSkipPackage, fmt.Errorf("parsing response error: %s", line)
	}
	resp.Proto = line[:indexByte]
	resp.Status = strings.TrimLeft(line[indexByte+1:], " ")
	statusCode := resp.Status
	if i := strings.IndexByte(resp.Status, ' '); i != -1 {
		statusCode = resp.Status[:i]
	}
	if len(statusCode) != 3 {
		return nil, enums.ParseResultSkipPackage, fmt.Errorf("parsing response status code failure: %v", statusCode)
	}
	resp.StatusCode, err = strconv.Atoi(statusCode)
	if err != nil || resp.StatusCode < 0 {
		return nil, enums.ParseResultSkipPackage, fmt.Errorf("status code not correct: %s", statusCode)
	}
	var ok bool
	if resp.ProtoMajor, resp.ProtoMinor, ok = http.ParseHTTPVersion(resp.Proto); !ok {
		return nil, enums.ParseResultSkipPackage, fmt.Errorf("parsing http version failure: %s", resp.Proto)
	}

	mimeHeader, err := tp.ReadMIMEHeader()
	if err != nil {
		result.buildHeaderBuffer(headerStartPosition, buf, bufReader)
		return result, enums.ParseResultSuccess, nil
	}
	resp.Header = http.Header(mimeHeader)

	result.buildHeaderBuffer(headerStartPosition, buf, bufReader)
	if readBody {
		if b, r, err := result.readFullResponseBody(bufReader, buf); err != nil {
			return nil, enums.ParseResultSkipPackage, err
		} else if r != enums.ParseResultSuccess {
			return nil, r, nil
		} else {
			result.bodyBuffer = b
		}
	}

	return result, enums.ParseResultSuccess, nil
}